The Grand Jupiter Secret Rare

Once per turn: You can discard 2 cards, then target 1 face-up monster your opponent controls; equip that face-up monster to this card. This card gains ATK equal to the combined original ATK of the monsters equipped to it by this effect. Once per turn, during the End Phase: You can target 1 Monster Card equipped to this card by this card's effect; Special Summon it to your field.